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Table 3 Procedures for assessing DRS-R98 items relevant to DSM-5 criteria for delirium

From: Concordance between DSM-IV and DSM-5 criteria for delirium diagnosis in a pooled database of 768 prospectively evaluated patients using the delirium rating scale-revised-98

DSM-5 criteria   Application of criteria
Post hocrating Strict Relaxed
Criterion A
A disturbance in attention DRS-R98 item 10 Attention score ≥1
and awareness with reduced orientation to the environment DRS-R98 item 9 Orientation score ≥1  
Criterion B
The disturbance develops over a short period of time (usually hours to a few days) DRS-R98 item 14 Temporal Onset ≥1 either
represents a change from baseline attention and awareness, and tends to fluctuate in severity during the course of a day DRS-R98 item 15 Fluctuation score ≥1
Criterion C
An additional disturbance in cognition (e.g. memory deficit, disorientation, language, visuospatial ability, or perception Any of the following: score of ≥1 on DRS-R98 item 11 Short term memory, item 9 Orientation, and Score of ≥2 on DRS-R98 item 5 Language, item 13 Visuospatial, item 2 Perceptual disturbance.
Criterion D
The disturbances in Criteria A and C are not better explained by a pre-existing, established or evolving neurocognitive disorder and do not occur in the context of a severely reduced level of arousal, such as coma. Where dementia is present, a total DRS-R98 score of ≥18 denoted presence of comorbid delirium
Criterion E
There is evidence from the history, physical examination or laboratory findings that the disturbance is a direct physiological consequence of another medical condition, substance intoxication or withdrawal, or exposure to a toxin, or is due to multiple etiologies DRS-R98 item 16 Etiology score ≥1
  1. DRS-98 Delirium Rating Scale-Revised-98, DSM-5 Diagnostic and Statistical Manual fifth edition.